Sewer plug



Feb. 4, 1930. c. F. FRIZZELL I 1,745,923 4 SEWER PLUG Fild Aug. 9, 1929 gwuwnlioz IIIIIlIIIIIIII'IIIIIIIIIIIIIIII 4 Cb/fus F Fir/zze/l f UNITED, STATES 4 Patented Feb. 4, 1930- PATENT orFicE CALFUSF. FRIZZELL, OF RICHMOND, VIRGINIA snwnn. PLUG Application filed August 9, 1929.- SerialNo. 384,685.

, My invention relates to sewer plugs and more, particularly to those which may be adapted to unstop drain pipes, sewers, toilets and the like.

' One.of the objects of'my invention is the provision of a plug for fitting pipes, or the uses; Fig.2, a plug 1n elevation; Fig. -3,'a

cross sectional view in detail along line 3-3 of Fi 2, and Fig. 4, a sectional view of a pipe s owing plug therein.

Referring to the drawings a conical plug air inlets are provided with threads for connecting with a source of supply.

Quite often a pipe having a smaller diameter than the usual plug, is encountered, which makes such 'a plug impractical for use. By the provision of conical sections 1 .I am enabled to obtain a plug suitable for any pipe diameter. e

As shown in Fig. 2, it may be preferred to use a smaller section on larger sections in order to fit a pipe of smaller 'diameter with- I out wasting time to form the conical plug.

By the provisionof the female members dlsposition in a countersunk portion of said section, the latter projects slightly beyond the former, and I am enabled to obtain a A resiliency desirable when the plug is placed in it.

Anotheruse of my plug is disclosed in pipe, to form a, tight oint, and not Fig. 1, and operates as follows: The plug is inserted in a drain pipe 13 of the-usual sink 14. A tube 15 is connected to the air inlet pipe and air tank'16. The tank is inflated 1 consisting of sections 2, made from any and upon releasing valve 17 thereon, comflexible material, such as rubber, are respec-' tively molded or worked on pipes 3.

The pipes 3 are; provided with external threads 4 which extend over the greater surface portion thereof so as to prevent lateral displacement between said section and pipe.

A threaded washer or locknut 5, adapted to register with the threaded pipe fits 1nto '3' a countersunk portion of said section and also acts to prevent lateral displacement in one directio A female memb r 6, having internal threads is adapted to engage a male member 7 of a similar sectio The first named member may be shaped se as to form an abutment for preventing lateral-displacement in a directlon opposite that of aforesaid washer.

The sections 2 are made conical in shape and coincide. when abuttingeach other, ex; cept under certain conditions hereinafter explained. 6

A T coupling pipe 8 having an air or gas I inlet 9 and Water inlet 10, respectively controlled by valvesll and 12,- is adapted to engage said male member 7. Both-water and 2. 'In a device of the character described I The tube; 15 may be I the combination of a plurality of conical resilient sections, a plurality of. pipes respecv tively engaging said resilient sections, means for preventing lateral displacement of said sections withurespect to said pipes, and a member having inlets therein controlled by valves and connected to one of said sections.

3. In adevice of thecharacter described the combination of a plurality of conical resilientv sections, a plurality of pipes respecs tively engaging said resilient sections, male members pr0 ect1ng from sa1d sections, female members 1n said sectlons and means for preventing lateral displacement of said sections with respect'to said pipes.

4. In a device of the character described the combination of a plurality of conical resilient sections, a plurality of pipes respectivel% engaging said resilient sections, male mem ers projecting from sald sections, female members in said sections and means for preventing lateral displacement of said sections with respect to said pipes, and a member having inlets therein, connected to one of said male members.

In testimony whereof I have hereunto set my name this th day of July, 1929.

CALFUS F. FRIZZELL. 

